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2Sl1eets-Sheet 1. E. D. EAMES. Noise Muffler.

Patented June' 15, v1880.

N. PEYERS. PHOTO-UTHOGRAPHER, wAsmNYon, D C,

eeeeeeeeeeeee 2. E'. D'. EAMES.' Noise Muffler. No. 228,744. Patented June l5, 1880.

UNIT-ED STATES PATENT OFFICE.

ELISHA D. EAMES, OF WATERTOWN, NEW YORK.

NOISE-MUFFLER.

y SPECIFICATION forming part of Letters Patent 'No. 228,744, dated June 15, 1880.

Application filed January 13, 1880.

To all whom it may concern:

Be it known that I, ELIsHA D. EAMES, a citizen of Watertowm residing at Watertown, in the county'of Jefferson and State of New York, have invented certain new and useful Improvements in Noise Mufflers5 and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specification, in which- Figure l represents a central vertical section of my improved noise-mufer for deadening the noise of escaping steam, air, or other vapor or gas under pressure, showing internal construction. Fig. 2 represents a side elevation, partly broken away, of the vertical walls or partitions of the series of chambers of my improved noise-muftler.

My invention relates to that class of inventions which has for its object the deadening or muflin g of the noise caused by the escape or discharge of steam or other vapor or gas under pressure through pipes or other pas-l sages from engines, air-ejectors, Svc., to the open air.

My invention is more specifically intended to be employed in connection with the ejector of vacuum -brake apparatus to deaden the noise caused by the escape to the outer air of the confined steam andA air.

For these purposes, myinvention consists of a muferformed of a series of communicating chambers, each of which, as they recede from the inlet-pipe, is, in turn, larger than the one which preceded it, for the purpose of enlarging their capacity, and hence decreasing the velocity of the escaping steam or other Vapor or gas as it nears the outlet-openings, whereby the noise caused by the great velocity of the steam as it issues from a confined outlet is completely deadened or muled.

Second. 1t also consists in the combination, with a device for deadening the noise, of acondensingcha-mber provided with a drip-cock, by means of which the water of condensation may be drawn off.

Third. It further consists in a new and im- 'ends of the cylinders by means of a wire rolled into their edges, for the purpose of reducing the vibration of the parts.

To enable others skilled in the art to make and use my invention, I will now proceed to describe it in detail.

In the drawings, in which the same letters of reference indicate the same parts, A represents the cast-metal head or cap-piece of the noise-muffler, on the inner face ot' which is cast a series of circular ridges, a b o, into which, respectively, is secured one end oi' one of the cylindrical partitions, B C D. The other end of the wall or casing B, which forms the exterior jacket of the noise-muffler, has secured-thereto a ring, E, in a manner similar to those secured to the head A. This ring E has an outwardly-projecting flange, with a ange-seat formed on its under side, and is provided at suitable distances apart with boltholes passing through the Harige-seat, and with screw-threads cut therein.

F represents a perforated diaphragm, having a series of circular ridges, d c, formed thereon, in a manner similar to those formed on the top plate, A and ring E, and for the same purpose. 'Into the ridges d e are respectively secured one end of one ot' the cylindrical partitions G H.

The cylinders C D are secured at their upper ends to the top plate, A, the cylinders G H at their lower ends to the diaphragm-plate F, and the outer cylinder, B, at its upper end to top plate, A, and at its lower end to ring E, in the following manner, viz: The cylinders C D G H are formed at one end with a series of lips, preferably bent alternately in opposite direetions, and the cylinder B is formed at its upper and lower ends with a circular series of small openings, for the purpose now to be described.

The ask and the mold for casting the top plate', A,on the side to which the cylinders C, D, and B are secured, isconstructed insuch manner as will allow of the ends of the cylinders C D,whiehhave the lip-projections and the upper end of the cylinder B, and which has a series IOO of circular openings, to be introduced sufficiently far into the mold to Wholly embed said lips and openings when the castingiseffected, care being taken that the cylinders shall be arranged concentrically with each other and at right angles to the top plate.

The cylinders Gr H are secured to the upper side of diaphragm F, and the lower end of cylinder B to the ring E, in the same manner as was described in connection with the casting of top plate, A, to cylinders B C D.' This mode of securing the head, ring, and diaphragm to the ends of the cylinders makes a rm and solid connection, the molten metal iowing around the alternately-bent lips and through the circular openings of the ends of the cylinders, and subsequently cooling, effecting a firm bond of union between them.

It is obvious that 'the cylinder B might be formed with lip-projections, in the same manner as the other cylinders, or the ends of the cylinders be formed with a series of circular openings, instead of in the manner shown and described; but I prefer to construct them as described.

The cylindrical partitions G H project upwardly from diaphragm F, when it is placed in position, and the cylindrical partitions C I) are pendent froln the head or cap-piece A.

When the perforated diaphragm F is placed in position-that is, upon the Aflange-seat of the ring E, it being provided with corresponding bolt-holes for the reception of the boltsthe partition H is projected Within the peildent partition D, and the partition G is projected between the pendent partitions C and D, thus forming a series of successively-enlarged chambers, g, h, i, and k, which serve to lessen the velocity, and thereby deaden and mufe the noise of the escaping steam. The casing I, which has a flange-seat and boltAholes corresponding to the bolt-holes in ring E and diaphragm F, is then placed in position and the whole bolted together by screw-bolts l. This casing I and diaphragm F form a chamber for the reception of the water of condensation. This chamber is provided with a drip-pipe, m, by means of which' the water of condensation is drawn off, and, if desired, the latter may be provided with a stop-cock. In the bottom of this chamber is cut or formed a central opening provided with a suitable screw-thread for the reception of the steam, steam and air, or other exhaust pipe, K, and from which is exhausted the matter, the noise of which is desired to be muffled or deadened on its escape to the outer atmosphere.

The perforated diaphragm F is formed with a central perforation or aperture, L, of about the samediameter as the exhaustpipe, to which the noise-muffler is attached, and of nearly but not quite the same size as the partition H, which forms, in effect, an enlarged continua- L tion of the exhaust-pipe K.

The projecting and depending partitions C D G H, respectively, are only secured at one end, the other end being free for the steam or other vapor or gas topass freely around the same and into the next chamber of the series, as clearly shown by Fig. l of the drawings. The free ends of these sheet-metal partitions are stiffened by means of a wire rolled into the edges, and which may be done in the usual manner, the object of which is to prevent the vibration of the same whilein actual use.

The diaphragm E has one or two perforations through it, between partitions G and H. An annular series of perforations are also cut through the diaphragm, between the outer jacket, B, and partition G.

The metal head or cap-piece A has cast or formed with it a detlector, O, which projects within the mouth of the tube or partition H, and serves to deflect the exhaust from chamber f to chamber g. The head A is also proA vided with a series of perforations, n, in the last of the series of chambers, between the partition G and the outer jacket, B, and at or near its outer periphery.

Thus constructed, the operation of the device is as follows: Upon the exhaust being opened, the steam or other vapor or gas passes, through exhaust-pipe K and central opening, L, into chamber f. From thence it is deflected .by the deilector O around the free end of the partition H into a chamber, g, of larger capacity. From thence it passes into the chamber h around the free end of the partition D, ot' still greater dimensions and so on through each succeeding chamber, z' and k, as clearly indicated by the arrows in Fig. l, until it issues from the series of perforations u into the outer air.

As the steam or air passes successively through the chambers, each succeeding one of the series of which has a greater capacity than the one preceding it, the velocity of the escaping steam, air, or other vapor or gas is gradually lessened, whereby, upon the final escape of the exhaust through the openings n to the external atmosphere, the noise which is caused thereby is completely deadened or mufiled. To effect this object as many chambers may be used as may be found necessary.

Having described my. invention, what I claim as new, and desire to secure by Letters Patent of the United States, is-

1. A noise muffler formed of a series of communicating chambers of graduated sizes, the walls or partitions of which are formed by a series of concentric cylinders opening alternately, the one into the other, at top and bottom, substantially as described, for the purpose of gradually enlarging the volume, and hence decreasing the velocity, of the escaping fluid, as set forth.

2. A noise-muffler formed of two or more sheet-metal cylinders united to two cast-metal heads, and a ring, in the manner shown and described.

3. A noise-muffler formed of two or more sheet-metal cylinders united to metal heads,

IOO

IIO

and arranged with respect to each other in by casting the latter thereon, substantially as the manner described, their free ends being set forth. 1o stiffened by means of a wire rolled into their ln testimony whereof I affix my signature edges for the purpose of reducing the Vibrain presence of two Witnesses.

tion of the parts, as set forth. ELISHA I). EAMES.

4. In a noise-mufer, a cylinder one end of Witnesses:

which is formed with lip projections, and I. H. MGDONALD,

which is secured to the top or bottom plate F. B. BROCK. 

